Deep beneath the city of Prague is another city altogether, one that most
people are completely unaware of, and that they’ll hopefully never see.
It is a system of hundreds upon hundreds of concrete bunkers with their own
electricity, water and ventilation systems awaiting the day that you might
hear the air-raid sirens wailing.

Air raid sirens are normal enough in Prague; they are heard all over the
city on the first Wednesday of every month at noon when they are tested.
The system of bomb shelters is in a similar state of readiness. In the
event of a war, there is room beneath the city for 40% of the population.
In peacetime however, the countless kilometres of tunnels are inhabited
only by a few dozen workers of the town hall’s shelters administration
department. Deep beneath Prague, they keep the bunker system in tip-top
shape from day to day, hoping at the same time it will never be used. Mr
Rostislav Guth is in charge of the department.

The pedestrian tunnel under Vítkov hill“In Prague there are roughly 800 permanent, pressurised bunkers. Almost
all of them were built in the 1950’s, some of them in later years, until
the metro was built, and then the last was the road tunnel at Strahov.
They’re classed according to their resistance and how many people they
can hold, from a few hundred in shelters under blocks of flats, to several
thousand like the Tamovka shelter we’re standing in front of now.”

One of the larger shelters is under Vítkov Hill. At the end of an alley
there is a pedestrian tunnel through the hill, and in the middle of that is
an inconspicuous door that leads to a forgotten world. This bunker is a
series of extremely long corridors with a long incline, about three to four
metres high and painted white and pastel green, the way communist-era
hospitals and prefab stairwells were. If you have ever been inside an old
WWII battleship for example, the atmosphere is similar, with an omnipresent
smell of grease, mould and paint. It’s not the kind of place you would
want to spend a lot of time in, but then even if there were a war, you
wouldn’t have to:

“These shelters were made for people to be able to survive here for 72
hours. Of course, everything ultimately depends on the type of attack we
would face, but 72 hours was considered enough time for safety measures to
be taken on the surface, enough time for them to be able to get to the
people inside the shelter if it were buried in debris and the optimum
period in terms of food stores and so on.”

Going into the Prague bunkers is a literal descent into history. Key to
the general ambience are the technological relics kept in perfect working
order. The machinery is almost all from the 1950s, great big objects piped
into the walls with huge bakelite knobs, and needle gauges. Everything is
of massive design, even the ancient telephones hanging from the walls, and
of course the ventilation system, the noise of which would probably drive
one mad within less than 72 hours.

“The ventilation system takes in air from outside through these filters
and it creates overpressure in the shelter. The shelter is then
‘inflated’, so to speak, and weaponised gases or toxic substances
wouldn’t be able to get in thanks to the overpressure created by the
ventilation system and the filters.”

The hundreds of metres of empty white tunnels, fluorescent lights and grey
pipes are ready to become a makeshift home for 1,250 people at any given
moment. Everything is meticulously cared for – the staff was particularly
pleased that I was unable to record any creaking and thudding sounds off
the heavy bulkheads that divide the shelter up, because they’re so well
oiled. With that kind of readiness, I half-expected to see mounds of
powered milk and canned plums – but I came a few decades late for that.

“Everything would rot if there were supplies down here, it would be a
waste of money, and there’s no sense in it either. If there was a threat
of war everything needed would be brought down for those 72 hours. We have
a 48-hour readiness period to prepare the bunkers. In that time, we’d we
fitting the air filters, bringing down food stores, beds and bottled water
… There are already five wells here, but that’s utility water.
Originally those things were here, but they realised it was senseless.
There was even canned food, they were storing cans down here that ended up
getting thrown away. But that was in the 50’s, when they thought there
could be a conflict any day.”

But again, sprawling though it may be, the Prague bunker system is only
big enough for 40% of the population - roughly less than half-a-million
people. Certainly even less than that number though is even aware of what
all is under their feet. In the event of a war, I thought, few would know
where to go, and if they did, they wouldn’t be room for them all.

“It depends on the so-called “running distance”, the shelters are
designed to hold the population within a 15-minute running distance, and
that’s established during peacetime. For example schools know which
shelter to take the children to even now in peacetime. Others would have to
use improvised shelters. If there were a threat to the country, cellars and
underground garages would be fortified. We always check new buildings, new
office buildings for example, to make sure their underground spaces can be
converted into shelters with air filters and so on in the event of a war.
They wouldn’t be pressure-resistant, but people would be able to wait out
an air raid there.”

The city’s emergency services would rely on notification systems
established during the Second World War. Each district has a plan for
sending its citizens to the appropriate shelter. Emergency workers would be
stationed around the city to help people orient themselves. The bunkers
themselves would have to be not only stocked but also cleared out within 24
hours, as many are rented out as storage space. And perhaps even more
difficult to imagine, the underground transportation services – the metro
and tunnels – would be transformed into a living space for tens of
thousands of people.

“Strahovský Tunnel is the largest makeshift shelter and it can shelter
15,000 people, if I leave aside the metro. Both have technical and medical
facilities running along the sides of the tunnels, and the tunnels then
would hold the people. The two ends of Strahovský Tunnel would be sealed;
the metro can be closed off every two stations. You can see it when you
enter the stations: big, heavy parts of the door that would seal the
station off. Or at least I see them because I’m in the business, everyday
citizens probably don’t notice them.”

In any case, if bombs start falling out of the sky over the Czech Republic
you’ll be better off squeezing into a bunker in Prague than anywhere else
in the country. While most people in the capital would find shelter
somewhere, elsewhere in the country there is only room for 12% of a
population of 10 million – small in comparison to other European
countries of similar size.

“Switzerland has 100% coverage. Or the Swedes, they have something like
70% of the population covered. The neutral states are basically the best
equipped, even in terms of the number of gas masks. When the east and west
were divided, the neutral states in between were the ones who paid the most
attention to it.”

It’s all so otherworldly, at the end of the day: a city under a city in
a peaceful European state, ready to house its people from nuclear
Armageddon or other such nastiness; Czechs in gas masks wandering up into a
bombed out Prague after 72 hours in 1950’s bunkers. It’s almost as
scary as the fact that it happened before, over sixty years ago, and the
people who work in the bunkers have little trouble visualising it again.

“It can certainly be imagined. These bunkers are made for war, and in a
time of war they will work. So we can imagine it.”